And both candidates can learn to support their voices with good breathing technique.

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Australian coach Ken Wood, who trained the Australian Olympic team in the 1980s and has worked with the Chinese Swimming Association since 2008, has been training Ye for the past two years: cultivating her breathing technique, improving her stroke and speeding her turns.

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One tactic he employs: a special breathing-relaxation technique originally developed for hospital patients in acute stress.

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The goal is to be mindful--of your breathing, as a relaxation technique, and of how you're approaching the task at hand.

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On the other hand, if you were lying in a smashed up car with a punctured lung, your best hope would be an ambulance from Staffordshire, where all paramedics learn a life-saving technique to keep you breathing, needle decompression.

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The 1960s technique involves focusing on the diaphragm while breathing, and emphasises breathing through the nose, accompanied by relaxation training.

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